JPS5777978A - Detecting device for obstacle mounted on vehicle - Google Patents
Detecting device for obstacle mounted on vehicleInfo
- Publication number
- JPS5777978A JPS5777978A JP55154409A JP15440980A JPS5777978A JP S5777978 A JPS5777978 A JP S5777978A JP 55154409 A JP55154409 A JP 55154409A JP 15440980 A JP15440980 A JP 15440980A JP S5777978 A JPS5777978 A JP S5777978A
- Authority
- JP
- Japan
- Prior art keywords
- waves
- ultrasonic
- rectangular
- ultrasonic waves
- transmitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To exactly measure a distance from a nearer obstacle by selecting a priority of a plurality of rectangular-wave forming circuits which deliver rectangular waves having a length from a time when ultrasonic waves are received by a plurality of ultrasonic-wave transmitting-receiving devices to the subsequent transmission of the ultrasonic wave. CONSTITUTION:Ultrasonic waves are transmitted from a plurality of ultrasonic- wave transmitting-receiving devices positioned in the right and left or in a similar manner through the intermediary of an intermittent oscillation circuit 50. Then, from RS-type FF 11L and FF 11R controlled by a delay circuit 54 which prohibits the direct going-round of the transmitted ultrasonic waves, rectangular waves having the length corresponding to the period from a time when reflected ultrasonic waves from an obstacle is received to a time when the subsequent ultrasonic waves are transmitted are generated. The first-transmitted rectangular waves out of the aforesaid rectangular waves are latched by a latch circuit 58 of a priority circuit 56 and, by lighting of LED 62L or 62R, the priority judgement on which side is nearer in distance is conducted. And, during the period of the first-generated rectangular waves, a pulse which is generated from a reference pulse generating circuit 65 and whose interval is adjustable in accordance with the change in the velocity of propagation of the ultrasonic waves corresponding to temperature is counted by a counter 66, and the distance from the nearer obstacle is indicated exactly in indication parts 72-74.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154409A JPS5777978A (en) | 1980-10-31 | 1980-10-31 | Detecting device for obstacle mounted on vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154409A JPS5777978A (en) | 1980-10-31 | 1980-10-31 | Detecting device for obstacle mounted on vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5777978A true JPS5777978A (en) | 1982-05-15 |
Family
ID=15583512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55154409A Pending JPS5777978A (en) | 1980-10-31 | 1980-10-31 | Detecting device for obstacle mounted on vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5777978A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19821929A1 (en) * | 1997-05-15 | 1998-11-26 | Matsushita Electric Works Ltd | Obstruction recognition and signalling method especially for vehicles |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4894465A (en) * | 1972-03-13 | 1973-12-05 | ||
JPS50597U (en) * | 1973-05-01 | 1975-01-07 | ||
JPS504154A (en) * | 1972-02-22 | 1975-01-17 |
-
1980
- 1980-10-31 JP JP55154409A patent/JPS5777978A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS504154A (en) * | 1972-02-22 | 1975-01-17 | ||
JPS4894465A (en) * | 1972-03-13 | 1973-12-05 | ||
JPS50597U (en) * | 1973-05-01 | 1975-01-07 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19821929A1 (en) * | 1997-05-15 | 1998-11-26 | Matsushita Electric Works Ltd | Obstruction recognition and signalling method especially for vehicles |
DE19821929C2 (en) * | 1997-05-15 | 2002-11-14 | Matsushita Electric Works Ltd | Obstacle detection and signaling device |
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